Orion is important for many reasons (I'm assuming you mean the spacecraft that just launched a week ago). It's as important as the Apollo capsule was for its time because it is designed to take people to further places than any human has been before. Like Apollo, Orion is designed to take people to deep space but unlike Apollo, it's final goal is not the Moon but Mars. It is able to support a crew of 4 for 3 weeks but to get to Mars it would require a habitation module. It is also capable of taking up to 6 people on board and make short trips to orbit the Moon. It uses a lot more modern technology so it's system is more compact (instead of a ton of buttons and knobs it has a touchscreen display that works similar to the one some cars have today. There's a lot more to talk about Orion but these are the most important.
You could not really say there is one important star in Orion. The constellation itself is the most prominent in the sky when it is visible, being unmistakeable and spectacular. Rigel is the brightest star, so it is important. Betelgeuse is next in terms of brightness and is a very interesting star to astronomers due to its large size and instability as a red giant. Other stars are interesting too. Then there is the Orion nebula, which is not a star, but is another major thing of interest in Orion. Orion's Belt with its three main stars is also interesting. They act as pointers to Sirius in the constellation Canis Major, the brightest star in the night sky, and to Aldebaran in the constellation Taurus. So Orion is full of interesting things, and this is why you could not say anything is most important.
Orion
Orion is a constellation made up in the minds of the ancients to represent "Orion" a hunter in mythology. The Orion Nebula is a diffuse nebula located south or Orion's belt. It is an area of extensive star formation. It is only called Orion Nebula as it is seen within the constellation of Orion. See related questions
orion
Orion represent the hunter. He was the son of Poseidon.
You could not really say there is one important star in Orion. The constellation itself is the most prominent in the sky when it is visible, being unmistakeable and spectacular. Rigel is the brightest star, so it is important. Betelgeuse is next in terms of brightness and is a very interesting star to astronomers due to its large size and instability as a red giant. Other stars are interesting too. Then there is the Orion nebula, which is not a star, but is another major thing of interest in Orion. Orion's Belt with its three main stars is also interesting. They act as pointers to Sirius in the constellation Canis Major, the brightest star in the night sky, and to Aldebaran in the constellation Taurus. So Orion is full of interesting things, and this is why you could not say anything is most important.
One.Orion doesn't "have constellations". Orion is a constellation.
Orion
Because it looks like the belt of the hunter Orion, as depicted in the stars of the constellation Orion.
Orion is a constellation made up in the minds of the ancients to represent "Orion" a hunter in mythology. The Orion Nebula is a diffuse nebula located south or Orion's belt. It is an area of extensive star formation. It is only called Orion Nebula as it is seen within the constellation of Orion. See related questions
The Orion telescopes are named after the constellation with the same name, the Orion constellation. The Orion constellation is named after the hunter in Greek mythology also with the same name, Orion.
Orion is a constellation
Orion.
orion
Betelgeuse is part of Orion, it is the red star on Orion's left shoulder.
in what part of the constellation Orion is the Orion nebula located at
Orion represent the hunter. He was the son of Poseidon.